I'm in the same situation when finding this thread.
Applied for PGWP on Sep 8, 2022, and still waiting. Received the Nov CCB (the last effective month of the previous permit and now on maintained status).
With the current timeline (165 days), hope to see the new permit in Feb 2023. So there may be 3 months without CCB (Dec 22, Jan & Feb 23), according to the information sharing that we have here.
I'll share the updates, and looking forward to someone with real case scenarios.
Thank you and Happy New Year.